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From: Matt Dillon <dillon@FreeBSD.org>
Date: Mon, 13 Jan 2003 15:04:32 -0800 (PST)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern kern_exec.c kern_exit.c sysv_ipc.c
         sysv_shm.c src/sys/sys ipc.h shm.h src/sys/vm vm_map.c
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dillon      2003/01/13 15:04:32 PST

  Modified files:
    sys/kern             kern_exec.c kern_exit.c sysv_ipc.c 
                         sysv_shm.c 
    sys/sys              ipc.h shm.h 
    sys/vm               vm_map.c 
  Log:
  It is possible for an active aio to prevent shared memory from being
  dereferenced when a process exits due to the vmspace ref-count being
  bumped.  Change shmexit() and shmexit_myhook() to take a vmspace instead
  of a process and call it in vmspace_dofree().  This way if it is missed
  in exit1()'s early-resource-free it will still be caught when the zombie is
  reaped.
  
  Also fix a potential race in shmexit_myhook() by NULLing out
  vmspace->vm_shm prior to calling shm_delete_mapping() and free().
  
  MFC after:      7 days
  
  Revision  Changes    Path
  1.208     +1 -2      src/sys/kern/kern_exec.c
  1.189     +1 -2      src/sys/kern/kern_exit.c
  1.24      +3 -4      src/sys/kern/sysv_ipc.c
  1.76      +15 -17    src/sys/kern/sysv_shm.c
  1.23      +2 -1      src/sys/sys/ipc.h
  1.18      +2 -1      src/sys/sys/shm.h
  1.280     +8 -0      src/sys/vm/vm_map.c

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